Being a progestin, trenbolone also has a dramatic effect on users’ natural testosterone production. Much in the same way that nandrolone does, trenbolone can suppress the natural production of testosterone for weeks after a user has ceased administering it. For this reason it is advisable that users use testosterone in conjunction with trenbolone if they wish to avoid sexual dysfunction, libido problems, or mental side effects associated with a lack of testosterone. Anecdotally many users have also reported that testicular atrophy is nearly always a problem when using trebolone and that it is much more dramatic than with other compounds. Users may wish to administer human chorionic gonadotropin to help counteract this.
Some of the approved drugs are synthetic versions of the natural hormones, such as trenbolone acetate and zeranol. Just like the natural hormone implants, before FDA approved these drugs, FDA required information and/or toxicological testing in laboratory animals to determine safe levels in the animal products that we eat (edible tissues). Furthermore, FDA required that the manufacturers demonstrate that the amount of hormone left in each edible tissue after treatment is below the appropriate safe level. As described above, a safe level is a level which would be expected to have no harmful effect in humans.
Anabolic steroids differ in their characteristics, which means there are steroids that are only suitable for specific uses. For instance, Trenbolone is not recommended for bulking but it is an outstanding fat burner. This makes it perfect for a lean mass cycle or a cutting cycle. Always take the side effects of a particular compound into consideration whenever you plan a stack. Do not combine anabolic steroids that show similar side effects. For example, never combine Anapolon and Dianabol because they are already quite toxic and if you combine them, the toxicity will increase exponentially and cause serious damage to your body.